"capernoitie" means: A wonderfully odd Scottish slang word for the head — specifically the noddle, the cranium, the thing sitting on top of your neck that's supp.... This is informal slang, common in casual speech, texting and social media, but not appropriate for school work, applications or professional settings. There is no real cause for concern in itself; it is everyday peer vocabulary. If your child uses it, a light comment about audience and register is usually enough — no need to escalate. Context, more than the word, tells you whether to follow up.